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Hair loss and aging are caused by the breakdown of a key protein in hair stem cells.

Blocking the enzyme 5α-reductase can shrink the prostate and help treat enlarged prostate issues.

Chitin and chitosan are useful in cosmetics for oral care, haircare, and skincare, including UV protection and strength improvement.

The Rotterdam Study aims to understand various diseases in older adults.

Guidelines suggest various treatments for alopecia areata, but leaving it untreated is also an option as 80% cases may recover on their own.

The skin is a complex barrier for drug penetration, but understanding its structure and interactions can improve drug delivery methods.

Laser hair removal is the most requested cosmetic procedure and has become a scientifically-based treatment suitable for all skin types.

Hair follicle stem cells use specific chromatin changes to control their growth and differentiation.

Skin cells produce and activate vitamin D, which regulates skin functions and supports hair growth.

The conclusion is that accurate diagnosis of different types of hair loss requires good teamwork between skin doctors and lab experts.

Chemotherapy-induced hair loss significantly affects patients' well-being, and nurses are key in helping them cope, but more research is needed to find effective treatments.

Male hormones affect COVID-19 severity and certain drugs targeting these hormones could help reduce the risk.

Eating disorders like anorexia and bulimia cause skin problems, and dermatologists can help detect these disorders early for better treatment outcomes.

Obesity is linked to various skin problems and may increase the risk of skin cancer.

Adult female acne treatment should be personalized, considering individual preferences and pregnancy, using various topical and oral medications while managing side effects and resistance.

Researchers found a new gene area linked to male-pattern baldness, which, along with another gene, significantly increases the risk of hair loss in men.

MicroRNA-214 is important for skin and hair growth because it affects the Wnt pathway.

5α-reductase is essential for male sexual development and its inhibitors have potential in treating various conditions related to hormone action.

The document concludes that dandruff and seborrheic dermatitis are linked to inflammation and skin changes, and treating them with specific shampoos can reduce these issues.

Minoxidil helps hair growth by activating the β-catenin pathway.

Some African American women's central scalp hair loss is linked to genetics and past fungal scalp infections, with more research needed on other causes.

Niosomes are promising for skin drug delivery, offering benefits like improved drug penetration and stability.

Frequent hair coloring and styling can damage hair and cause breakage or loss.

Women with PCOS have different levels of certain fats and proteins in their blood, which could help diagnose the condition.

Women with PCOS have fewer activated T cells in their ovarian follicles, which might affect fertility.

Dermatoscopy is a useful tool for diagnosing hair disorders and can help choose samples for more detailed analysis.

The document concludes that for hair and feather growth, it's better to target the environment around stem cells than the cells themselves.

Improving insulin sensitivity and weight loss can help manage polycystic ovary syndrome (PCOS).

Cationic polymers improved liposome stability and increased skin absorption of aciclovir and minoxidil.

Nanotechnology in dermatology shows promise for better drug delivery and treatment effectiveness but requires more safety research.